bone ash meaning in Hindi

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Lead was melted in a bone ash'test'or'cupel'and air blown across the surface.
Bone ash was the major source of phosphorus until the 1840s.
This used bone ash for a phosphate source, as described above.
Sacks of powdery bone ash were emptied in the river.
In 1749, Thomas Frye took out a patent on a porcelain containing bone ash.
Horsford used bone ash, which is mostly calcium carbonate.
Other raw materials can include feldspar, ball clay, glass, bone ash, steatite, quartz, petuntse and alabaster.
Calcium phosphate is one of the main combustion products of bone ( see bone ash ).
Furthermore, the preparation of silverpoint supports, usually with hide glue with finely ground bone ash, was labor-intensive.
The opacifiers can be e . g . bone ash, or tin dioxide and arsenic and antimony compounds.

noun.

ash left when bones burn; high in calcium phosphate; used as fertilizer and in bone china